TABLE 1.
Sensitivity and specificity of composite performance compared to the reference laboratory results
| Test | No. of true positives | No. of true negatives | No. of false positives | No. of false negatives | Total | Sensitivity
|
Specificity
|
||
|---|---|---|---|---|---|---|---|---|---|
| Frequency | Estimate (95% CIb) | Frequency | Estimate (95% CI) | ||||||
| Urine culture | 79 | 75 | 2 | 0 | 159 | 79/79 | 100.0 (95.4–100.0) | 75/77 | 97.4 (90.9–99.7) |
| Serology (IgG) | 63 | 51 | 3 | 3 | 120 | 63/66 | 95.5 (87.3–99.1) | 51/54 | 94.4 (84.6–98.8) |
| Serology (IgM) | 25 | 46 | 5a | 2 | 78a | 25/27 | 92.6 (75.7–99.1) | 46/51 | 90.2 (78.6–96.7) |
a
Two equivocal tests were included in the analysis.
b
CI, confidence interval.